However, the planned launch will not now take place on Saturday as a result of a fuel leak. “The #Artemis I mission to the Moon has been postponed. Teams attempted to fix an issue related to a leak in the hardware transferring fuel into the rocket, but were unsuccessful,” NASA’s official Twitter account announced. There is another launch window on Monday. The 322-foot-tall Space Launch System (SLS) and the Orion spacecraft were due to lift off from the Kennedy Space Center in Cape Canaveral, Florida in a historic mission....

The X-59 Quiet SuperSonic Technology (QueSST) aircraft got its final approval for assembly following a major project review known as Key Decision Point-D (KDP-D), putting the plane on track for construction by 2020 and its first flight in 2021, NASA announced this week. “With the completion of KDP-D we’ve shown the project is on schedule, it’s well planned and on track. We have everything in place to continue this historic research mission for the nation’s air-traveling public,” Bob Pearce, NASA’s Associate Administrator for Aeronautics, said in a statement....

These include some crystal-clear images of the rover’s own wheels, which have been stitched together to form a short video of them wiggling from side to side. The sets of animated images show seven different views of Perseverance shaking its wheels from the perspective of two different on-board cameras. High-resolution photos of the surface of Mars have also shown Perseverance’s tracks in the landscape after the rover drove for the first time on March 4....

The space agency reported that Voyager attempted to make a scheduled maneuver on January 25 that normally involves the spacecraft rotating 360 degrees to calibrate its onboard magnetic field instruments. However, this maneuver didn’t turn out as planned and one of the spacecraft’s autonomous fault protection routines was triggered. These routines are designed to protect the spacecraft from further damage when problems occur. According to the initial information received by engineers at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California—which manages Voyager 2 and its sister craft, Voyager 1—an error left two power-hungry systems operating at the same time....

The first of the space rocks to fly by the Earth on September 14—dubbed 2020 RF3—has actually already made its closest approach to our planet, according to NASA’s Center for Near Earth Object Studies (CNEOS) at the Jet Propulsion Laboratory, California Institute of Technology. At 6:49 a.m. UTC (2:49 a.m. ET) the asteroid came within 0.00063 astronomical units (AU) or 58,500 miles of Earth. This is only around a quarter of the distance between the moon and our planet, which is a very close shave in cosmic terms....

While these polyps might not affect your child much, they have the potential to reduce your child’s sense of smell or make it difficult for your child to breathe by blocking the nostrils. When that happens, there are steps you can take at home and with medical treatments for nasal polyps that are safe for kids. How Do I Know If My Child Has Nasal Polyps? Even if your child isn’t able to tell you specifically what’s bothering them, many symptoms of nasal polyps can be observed....

The racing itself was straightforward, however, with Elliott dominating the field. He won Stages 2 and 3 before finishing the event on top. His prize was a cool $1 million. Kyle Busch finished second, Kevin Harvick finished third, Brad Keselowski finished fourth and Denny Hamlin rounded out the top five. A qualifying competition named the All-Star Open, plus a fan vote, determined the final four spots in the 20-entrant field....

Just 14 laps into the Rhino Linings 350, Tyler Reddick got loose in Turn 4 and was unable to correct his truck, catching the rear of Theriault and sending him into an area of the wall not protected by SAFER barrier. MORE: NASCAR’s toughest drivers After the wreck, Theriault was able to climb out under is own power, but was placed on a backboard before being loaded into an ambulance....

This question originally appeared on Quora - the knowledge sharing network where compelling questions are answered by people with unique insights. You can follow Quora on Twitter, Facebook, and Google+. Answer by Parker Kligerman, pro race car driver for 10+ years, on Quora: This is a tough answer to generalize, as it is different for each racing series. The reason is that each series has a different way the driver sits in the car, the cars are made of different materials, and lastly they race at different types of tracks....

Drivers’ starting positions for the Buschy McBusch Race 400 (3 p.m. ET; FS1, TSN, MRN, SiriusXM NASCAR Radio) were based on four factors: Driver’s finishing position from the previous race (25 percent) Car owner’s finishing position from the previous race (25 percent) Team owner points ranking (35 percent) Fastest lap from the previous race (15 percent) NASCAR is conducting qualifying and practice for just eight Cup Series races in the 2021 season....

Instead of going from ninth on the grid, Truex started 43rd. Not ideal for a driver trying to maintain his place in the Chase field. MORE: What’s needed at Dover | Restart rule enforcement | Chase standings Truex entered the AAA 400 at Dover International Speedway 14 points ahead of Dale Earnhardt Jr., who was 12th in the standings. He had to maintain his position in the top dozen drivers to advance....

The winning bidder on Olsen’s 1969 Camaro convertible: NASCAR team owner Rick Hendrick. All proceeds from the sale go to Olsen’s Receptions for Research benefiting The HEARTest Yard, which pays for in-home nursing care for children who had heart surgery at a Charlotte, N.C., hospital. MORE: x T.J. Olsen, the player’s son, was born in 2012 with a congenital heart defect. Olsen and his wife, Kara, subsequently founded The HEARTest Yard to help parents who find themselves in a similar position....

Hamlin won Saturday’s 311-lap race, while Harvick claimed the back end of the Delaware doubleheader Sunday. Harvick (1,041) and Hamlin (907) continue to lead the points standings. They will be the favorites once the NASCAR Cup Series playoffs begin. Jimmie Johnson, meanwhile, is breathing down the necks of Matt DiBenedetto and William Byron for the final postseason position. MORE: NASCAR at Dover highlights There is just one more race in the 2020 NASCAR regular season — at Daytona next weekend — which means the dual competitions at Dover were key deciders in who will get to fight for a Cup Series title....

It sounds so simple with just one race remaining before the Chase for the NASCAR Sprint Cup begins, but a win by those drivers that have not visited victory lane this season guarantees a spot in the Chase (as long as they are in the top 30 in points). PHOTOS: Jeff Gordon’s final season in NASCAR | MORE: Chase for the Sprint Cup standings going into Richmond As of now, 11 drivers are qualified for NASCAR’s version of the playoffs with wins (so long as they start at Richmond): Jimmie Johnson, Dale Earnhardt Jr....

Kyle Busch, Austin Dillon, Clint Bowyer and Aric Almirola likely need a victory at the ROVAL course to advance to the next round. Inclement weather conditions for the competition might provide the type of chaos they need to get that done. Just look at how Saturday’s Xfinity Series race ended at the same venue: MORE: NASCAR’s special rain rules for ROVAL, explained While some rain is OK for racing Sunday, lightning would prompt an automatic delay of at least 30 minutes, according to NASCAR....

He dominated in the late stages to come away with the victory and tie Kyle Busch and Brad Keselowski for the most wins this year. Truex was followed by Joey Logano and Busch, who placed second and third, respectively. Keselowski won the first two stages, but dropped to 19th in the end. There were multiple big crashes at Charlotte Motor Speedway on Sunday. Truex struggled with car issues early on, but he was able to overcome them....

Jones passed Martin Truex Jr.—who finished second — on the final lap to take the checkered flag. AJ Allmendinger placed third. COKE ZERO SUGAR 400: SN’s live blog There were 10 cautions during the race and multiple top competitors were involved in crashes. Brad Keselowski, Joey Logano and Denny Hamlin were all knocked out after a pileup during the 54th lap. Kyle Busch and William Byron — who held the lead for 11 laps — were eliminated in another wreck less than 12 laps later....

Last Sunday it was Johnson winning at Charlotte Motor Speedway; seven days later it was Harvick pulling away late at Kansas Speedway for his 35th career win and his fourth this season. MORE: Harvick holds off Chasers at Kansas “To be able to do that now for three years says a lot about the character of this team,” Harvick told NBC Sports after the race. “There’s going to be some bumps along the way, some obstacles....